Added member data to classes to support download resumption.

content/browser/download/mock_download_file.cc

Index: content/browser/download/mock_download_file.cc
diff --git a/content/browser/download/mock_download_file.cc b/content/browser/download/mock_download_file.cc
index 7042f007d1fc4f77b4645ec33abcc4d709a60bef..885def180d9cc17b8f940a0d10b807e6ddd8b414 100644
--- a/content/browser/download/mock_download_file.cc
+++ b/content/browser/download/mock_download_file.cc
@@ -46,7 +46,7 @@ MockDownloadFile::MockDownloadFile(
 MockDownloadFile::~MockDownloadFile() {
 }
 
-net::Error MockDownloadFile::Initialize(bool calculate_hash) {
+net::Error MockDownloadFile::Initialize() {
   in_progress_ = true;
   if (recorder_)
     recorder_->Record(StatisticsRecorder::STAT_INITIALIZE);
@@ -109,10 +109,14 @@ int64 MockDownloadFile::CurrentSpeed() const {
   return 0;
 }
 
-bool MockDownloadFile::GetSha256Hash(std::string* hash) {
+bool MockDownloadFile::GetHash(std::string* hash) {
   return false;
 }
 
+std::string MockDownloadFile::GetHashState() {
+  return "";
+}
+
 // DownloadFileInterface implementation.
 void MockDownloadFile::CancelDownloadRequest() {
 }